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Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/netlink.c: TIPC configuration handling | |
c4307285 | 3 | * |
0655f6a8 | 4 | * Copyright (c) 2005-2006, 2014, Ericsson AB |
59f0c452 | 5 | * Copyright (c) 2005-2007, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #include "core.h" | |
38 | #include "config.h" | |
0655f6a8 | 39 | #include "bearer.h" |
b97bf3fd PL |
40 | #include <net/genetlink.h> |
41 | ||
42 | static int handle_cmd(struct sk_buff *skb, struct genl_info *info) | |
43 | { | |
44 | struct sk_buff *rep_buf; | |
45 | struct nlmsghdr *rep_nlh; | |
46 | struct nlmsghdr *req_nlh = info->nlhdr; | |
47 | struct tipc_genlmsghdr *req_userhdr = info->userhdr; | |
573ce260 | 48 | int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); |
59f0c452 | 49 | u16 cmd; |
b97bf3fd | 50 | |
90f62cf3 | 51 | if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN))) |
59f0c452 | 52 | cmd = TIPC_CMD_NOT_NET_ADMIN; |
b97bf3fd | 53 | else |
59f0c452 AS |
54 | cmd = req_userhdr->cmd; |
55 | ||
56 | rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd, | |
573ce260 H |
57 | nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN, |
58 | nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN), | |
59f0c452 | 59 | hdr_space); |
b97bf3fd PL |
60 | |
61 | if (rep_buf) { | |
62 | skb_push(rep_buf, hdr_space); | |
b529ccf2 | 63 | rep_nlh = nlmsg_hdr(rep_buf); |
b97bf3fd PL |
64 | memcpy(rep_nlh, req_nlh, hdr_space); |
65 | rep_nlh->nlmsg_len = rep_buf->len; | |
15e47304 | 66 | genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid); |
b97bf3fd PL |
67 | } |
68 | ||
c4307285 | 69 | return 0; |
b97bf3fd PL |
70 | } |
71 | ||
0655f6a8 RA |
72 | static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = { |
73 | [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, }, | |
74 | [TIPC_NLA_BEARER] = { .type = NLA_NESTED, }, | |
75 | }; | |
76 | ||
77 | /* Legacy ASCII API */ | |
acb0a200 | 78 | static struct genl_family tipc_genl_family = { |
c4307285 YH |
79 | .id = GENL_ID_GENERATE, |
80 | .name = TIPC_GENL_NAME, | |
81 | .version = TIPC_GENL_VERSION, | |
82 | .hdrsize = TIPC_GENL_HDRLEN, | |
83 | .maxattr = 0, | |
b97bf3fd PL |
84 | }; |
85 | ||
0655f6a8 | 86 | /* Legacy ASCII API */ |
c53ed742 JB |
87 | static struct genl_ops tipc_genl_ops[] = { |
88 | { | |
89 | .cmd = TIPC_GENL_CMD, | |
90 | .doit = handle_cmd, | |
91 | }, | |
b97bf3fd PL |
92 | }; |
93 | ||
0655f6a8 RA |
94 | /* Users of the legacy API (tipc-config) can't handle that we add operations, |
95 | * so we have a separate genl handling for the new API. | |
96 | */ | |
97 | struct genl_family tipc_genl_v2_family = { | |
98 | .id = GENL_ID_GENERATE, | |
99 | .name = TIPC_GENL_V2_NAME, | |
100 | .version = TIPC_GENL_V2_VERSION, | |
101 | .hdrsize = 0, | |
102 | .maxattr = TIPC_NLA_MAX, | |
103 | }; | |
104 | ||
105 | static const struct genl_ops tipc_genl_v2_ops[] = { | |
106 | { | |
107 | .cmd = TIPC_NL_BEARER_DISABLE, | |
108 | .doit = tipc_nl_bearer_disable, | |
109 | .policy = tipc_nl_policy, | |
110 | }, | |
111 | { | |
112 | .cmd = TIPC_NL_BEARER_ENABLE, | |
113 | .doit = tipc_nl_bearer_enable, | |
114 | .policy = tipc_nl_policy, | |
35b9dd76 RA |
115 | }, |
116 | { | |
117 | .cmd = TIPC_NL_BEARER_GET, | |
118 | .doit = tipc_nl_bearer_get, | |
119 | .dumpit = tipc_nl_bearer_dump, | |
120 | .policy = tipc_nl_policy, | |
0655f6a8 RA |
121 | } |
122 | }; | |
123 | ||
4323add6 | 124 | int tipc_netlink_start(void) |
b97bf3fd | 125 | { |
acb0a200 | 126 | int res; |
b70e4f45 | 127 | |
c53ed742 | 128 | res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops); |
0655f6a8 RA |
129 | if (res) { |
130 | pr_err("Failed to register legacy interface\n"); | |
131 | return res; | |
132 | } | |
133 | ||
134 | res = genl_register_family_with_ops(&tipc_genl_v2_family, | |
135 | tipc_genl_v2_ops); | |
acb0a200 | 136 | if (res) { |
2cf8aa19 | 137 | pr_err("Failed to register netlink interface\n"); |
acb0a200 MM |
138 | return res; |
139 | } | |
c4307285 | 140 | return 0; |
b97bf3fd PL |
141 | } |
142 | ||
4323add6 | 143 | void tipc_netlink_stop(void) |
b97bf3fd | 144 | { |
acb0a200 | 145 | genl_unregister_family(&tipc_genl_family); |
0655f6a8 | 146 | genl_unregister_family(&tipc_genl_v2_family); |
b97bf3fd | 147 | } |